Werk #7776: Fix grouping views by tags

Component User interface
Title Fix grouping views by tags
Date Jun 11, 2019
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.6.0b2 2.0.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

When trying to use tag painters for grouping table views this resulted in an exception TypeError (<lambda>() takes exactly 2 arguments (1 given)) in 1.6.0b1.

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